Support

Cold water or hot water high-pressure cleaning – which is right for you?

Cold Water High-Pressure Cleaning

Cold water high-pressure washers clean effectively thanks to the high impact pressure they provide. Machines with high water flow also help to flush away dirt and rinse quickly. With cold water machines, the temperature has no influence on the cleaning action. For removing stubborn dirt like oil and grease, cleaning results can be improved by using detergents.

Key advantages of HD machines:

Lower cost

Less expensive to buy

No water heating costs

Low service and repair costs

Fewer components

More compact dimensions

Lower weight

Easier to transport and store

Simpler to service

Hot Water High-Pressure Cleaning

Hot water high-pressure washers increase the supplied water temperature to up to 80°C for general cleaning or up to 150°C for steam cleaning. This allows a reduction of the working pressure, cleaning time and the amount of detergent needed.

Key advantages of HDS machines:

Faster cleaning

Reduced labour cost

Shifting stubborn dirt easily

Shorter drying time

More effective dissolving of oil and grease

Improved results

Reduces likelihood of streaks

Fully dry objects attract new dirt less easily

Effective antibacterial action

Reduced need for detergents

Less-contaminated waste-water

More versatile

Can be used in cold, hot or steam mode

Variable temperature to suit the cleaning job

Eco!efficiency mode reduces heating oil consumption

Reduced impact pressure

Gentle to sensitive surfaces

Same cleaning effect at lower working pressure

Improved cleaning results at identical working pressure

Efficient high-pressure cleaning

Heat energy is an important factor in the cleaning process. The use of heat accelerates chemical processes; every 10 °C increase in temperature doubles the reaction speed. A 20 °C increase in temperature greatly increases the reaction speed. Oil, grease or soot are dislodged due to the heat and are easy to remove. The emulsion of oil and grease in water is accelerated. Finally, a heated surface dries faster. In practice, this means that higher water temperatures can reduce cleaning times by up to 40 % – with far better results.

Clear cost comparison

The cost of purchasing and maintaining a hot water pressure washer is generally higher due to the additional burner and related energy consumption. Using hot water offers a time saving of up to 40% with improved cleaning results. In addition, the HDS normally obviates the need for further detergent costs. Since labour costs can be a multiple of the purchase and operating costs over the total lifecycle of the high-pressure washer, the use of HDS is often the more economical solution, depending on the type of application.

Typical fields of application for HD:

Just to say many thanks for your excellent service. Parts have been received and are fine.
Many thanks

Des Slevin

Hello Steve,
Now that’s good service & appreciated too...Yes, you are bang on the money, sending me this download PDF. I have identified the part or parts and printed off the PDF you sent me....You know? I think you are right regarding the Gun bayonet side also. I think I will call in at the shop Atherton Steve.
One again thanks for the excellent service from you

Mike Smith

I wish to express my appreciation for your prompt and helpful service. The hose was received today -much earlier than expected ! - and as promised was a perfect fit for my machine. I also appreciate the fact that there was no surcharge, as is often the case, for delivery to the Western Isles.
A fully satisfied customer!

About Karcher Center STS

With over 30 years experience in the cleaning equipment industry, we at Karcher Center STS specialise in the sale, repair, service and lease of Karcher pressure washers and floor cleaning equipment and are justifiably proud of our association with Karcher cleaning products.